External surface of a duck blind boat cover



FIG. 1 is a side elevation view of an external surface of a duck blindboat cover showing my new design;

FIG. 2 is a side elevation view thereof opposite to the side shown inFIG. 1;

FIG. 3 is an enlarged front elevation view thereof;

FIG. 4 is an enlarged rear elevation view thereof;

FIG. 5 is a top plan view thereof, the opposite bottom surface beingunornamented and not constituting part of the present design; and,

FIG. 6 is a fragmented enlarged sectional view, taken substantiallyalong line 6--6 in FIG. 5.

The ornamental design for an external surface of a duck blind boatcover, as shown and described.